Molecularity of Reaction

Q. The rate constant of reaction is $1.2\times {10}^{-1}mo{l}^{-2}lite{r}^2{s}^{-1}$ , the order of the reaction is

1. zero
2. 1
3. 2
4. 3

Q. Certain bimolecular reactions which follow first order kinetics are called

1. First order reaction
2. Pseudo unimolecular reactions
3. Bimolecular reaction s
4. Unimolecular reactions

Q. $2NO\left(g\right)+C{l}_2\left(g\right)\to 2NOCl\left(s\right):$ This reaction was studied at $–{10}^{o}C$and the following data was obtained

Run	$[NO{]}_0$	$Cl{]}_0$	$r_0$
1	0.10	0.10	0.18
2	0.10	0.20	0.35
3	0.20	0.20	1.40

$[NO{]}_0$ and $[C{l}_2{]}_0$ are the initial concentrations and $r_0$ is the initial reaction rate. The overall order of the reaction is . (Round off to the Nearest Integer).

Q. Which of the following statements about molecularity of any reaction are incorrect?

1. It is experimentally determined
2. It is meant for the reaction and not for its individual steps
3. It may or may not be whole number.
4. It can never be zero

Q. Karthik and Arun are studying chemical kinetics together. They came around this equation: $N_2+3H_2\to 2N{H}_3$.
Karthik concluded that the molecularity of the reaction is 4 as one molecule of $N_2$ is reacting with three molecules of $H_2$.
But Arun said that molecularity of 4 is very unlikely as the probability of 4 molecules colliding simultaneously is almost zero.
As they are both contradicting each another can you figure out who is correct and who is wrong.

1. Karthik is correct, Arun is wrong
2. Both are wrong
3. Karthik is wrong Arun is correct
4. Both are correct

Q. Two reactions are given to Karthik and Arun, one each, to find the molecularity of the reaction. Consider both reactions to be elementary.
Reaction (A) is $N{H}_{4}N{O}_2\to N_2+2H_{2}O$
Reaction (B) is $2HI\to H_2+I_2$
Karthik got the answer as 2 and Arun got the answer as 1, which are correct. Can you tell which reactions were given to Karthik and Arun?

1. Karthik – Reaction A, Arun reaction B
2. Arun – Reaction A, Karthik Reaction B

Q. Which of the following are the acceptable values for molecularity of a reaction?

1. 2
2. 0
3. 0.5
4. -1

Q.

In a series of reactions, which is the rate-determining step?

1. the slowest reaction

2. the simplest reaction

3. the fastest reaction

4. None of the above

Q.

What does termolecular refer to?

1. 2 molecules colliding

2. 4 molecules colliding

3. 3 molecules colliding

4. 1 molecule dissociating

Q.

1. If both statements are TRUE and statement -2 is the correct explanation of statement-1
2. If both the statements are TRUE but statement-2 is NOT the correct explanation of statement-1
3. If statement-1 is TRUE and statement-2 is FALSE
4. If statement-1 is FALSE and statement-2 is TRUE